Reinforced open-hole zonal isolation packer

Details Reinforced open-hole zonal isolation packer Reinforced open-hole zonal isolation packer

E - Fixed Constructions

21

B

E21B 33/128 (2006.01) E21B 17/10 (2006.01)

Patent

CA 2615757

A packer device and methods of use for a packer within uncased wellbore to form a complete fluid seal. The packer device (36) includes a central mandrel body (44) that retains a plurality of nested, telescopic expanding elements (50) that are moveable outwardly from the mandrel body. The mandrel body and expanding elements are surrounded by a load- distributing structure (58) as well as a sealing element (60), which is typically comprised of elastomer. The packer device is hydraulically actuated to urge the expansion members radially outwardly against the load-distributing structure and the sealing element. Because there are a number of discrete expansion elements, the packer device is better able to create a fluid seal within an uncased borehole with surface irregularities.

La présente invention concerne un dispositif d~étanchéité et les procédés d~utilisation d~une matière étanche dans un puits non bétonné pour former une étanchéité complète aux fluides. Le dispositif d~étanchéité (36) comprend un corps de mandrin central (44) qui retient une pluralité d~éléments protubérants télescopiques imbriqués (50) qui peuvent sortir du corps du mandrin. Le corps du mandrin et les éléments protubérants sont entourés d~une structure de distribution de charge (58) ainsi que d~un élément d~étanchéité (60) qui se compose typiquement d~élastomère. Le dispositif d~étanchéité est actionné hydrauliquement pour donner une impulsion aux membres sortant radialement vers l~extérieur contre la structure de distribution de charge et l~élément d~étanchéité. Étant donné qu~il existe un certain nombre d~éléments sortants séparés, le dispositif d~étanchéité sera mieux en mesure de créer une étanchéité aux fluides dans un puits non bétonné qui présente des irrégularités de surface.

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